Study of graph invariants and parameters associated to complex networks in the context of biomedicine and social sciences. As an example, the network associated to the
Erdös number
(since 1995, mine is 2).

Communication problems in networks: broadcasting and gossiping.

The use of combinatorial optimization algorithms for
problems like the design of certain classes of (complex) networks or communication
strategies, planarization,
the design of codes, coloring of graphs or frequency assignment:

Vice-Dean and Head of Studies, Technical School of Telecom (Escola
Universitària del Baix Llobregat), 1996-1998. Vice-Dean, School of Telecommunications (Escola Tècnica
Superior d'Enginyeria de Telecomunicació de
Barcelona) 1992-1994.